Carbon storage in total biomass and soil in a teak(Tectona grandis L.f.) plantation

Resumen

Objective: To estimate carbon storage in young teak plantations (Tectona grandis L.f.) in total biomass, dry litter, and soil due to the effects of chemical fertilizers and green manure (GM).
Methodology: A completely randomized block experimental design was used. At two years of age, chemical fertilizer (CF) (NPK) treatments were applied: control 0-0-0, 60-60-60, 90-60-60, and 120-60-60 kg ha-¹. At three and four years of age, treatments 0-0-0, 120-60-60, 150-60-60, and 180-60-60 kg ha-¹ were used. Crotalaria juncea was used as green manure (GM).
Results: Significant differences were observed in the interactions between CF and AV on total biomass at both ages, 3.2 and 4.7 years. The highest values were recorded in the control without AV and in the 180-60-60 kg ha-¹ treatment with AV. No significant differences were detected in litterfall. At 3.2 years of age, the plot without AV receiving the 90-60-60 kg ha-¹ dose exhibited the greatest increase in carbon storage, whereas at 4.7 years, the highest increase occurred in the control with AV. Significant differences were also
observed in soil carbon storage (SOC), with an increase of 166.32 t C ha-¹ under the 150-60-60 kg ha-¹ treatment.
Conclusion: Total biomass at 3.2 years of age can store 35.05 t C ha-¹. Carbon in litter increases with the dose of chemical fertilization. Overall, a greater amount of carbon is stored in the soil than in above-ground and below-ground biomass and litter.